The SLN function calculates the Straight Line Depreciation of an item, with the given values.
= SLN(Cost, Salvage, Life) Whereas Cost - initial cost of the asset. Salvage - value at the end of the depreciation or the Selling Price Life - the number of periods over which the asset is depreciated. SLN is calculated as the difference between Cost and Salvage divided by the life (no of years)
Let us check if the given number is positive or negative, using the SIGN function, with the help of the below video.